optimization: check for empty xmit_table before removal
optimization: check for empty xmit_table before removal

ligzy/JGroups,TarantulaTechnology/JGroups,rhusar/JGroups,pferraro/JGroups,danberindei/JGroups,vjuranek/JGroups,dimbleby/JGroups,Sanne/JGroups,slaskawi/JGroups,tristantarrant/JGroups,pruivo/JGroups,kedzie/JGroups,TarantulaTechnology/JGroups,kedzie/JGroups,pferraro/JGroups,danberindei/JGroups,belaban/JGroups,belaban/JGroups,Sanne/JGroups,deepnarsay/JGroups,ibrahimshbat/JGroups,slaskawi/JGroups,ligzy/JGroups,rpelisse/JGroups,kedzie/JGroups,rhusar/JGroups,ligzy/JGroups,rvansa/JGroups,rpelisse/JGroups,vjuranek/JGroups,rvansa/JGroups,danberindei/JGroups,rpelisse/JGroups,pferraro/JGroups,TarantulaTechnology/JGroups,dimbleby/JGroups,pruivo/JGroups,deepnarsay/JGroups,deepnarsay/JGroups,ibrahimshbat/JGroups,slaskawi/JGroups,belaban/JGroups,vjuranek/JGroups,dimbleby/JGroups,Sanne/JGroups,ibrahimshbat/JGroups,pruivo/JGroups,tristantarrant/JGroups,ibrahimshbat/JGroups,rhusar/JGroups